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A theatrical fog machine produces dense fog can be used to blow fog into a duct system to make leaks obvious.

A theatrical fog machine produces dense fog can be used to blow fog into a duct system to make leaks obvious.
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A theatrical fog machine produces dense fog that can be used to blow fog into a duct system to make leaks obvious.

A theatrical fog machine produces dense fog that can be used to blow fog into a duct system to make leaks obvious.
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A tree of main vents is installed on top of drip piping

A tree of main vents is installed on top of drip piping
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A triple-filtered energy recovery ventilator is installed with individual supply ducts to provide fresh air to each room.

A triple-filtered energy recovery ventilator is installed with individual supply ducts to provide fresh air to each room.
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A vacuum decay test is performed on this ductless mini-split heat pump using a digital micron gauge for accurate measurement; a deep vacuum is achieved quickly by using large diameter, vacuum-rated hoses, and removing valve cores

A vacuum decay test is performed on this ductless mini-split heat pump using a digital micron gauge for accurate measurement; a deep vacuum is achieved quickly by using large diameter, vacuum-rated hoses, and removing valve cores
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A ventilation controller with a manual override is located on a central air handler fan that is located in an accessible location

A ventilation controller with a manual override is located on a central air handler fan that is located in an accessible location
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A ventless gas fireplace has no chimney

A ventless gas fireplace has no chimney
Presentation:

A Whole New World – ENERGY STAR + HVAC Grading

Presentation:

Advances in Manufactured Home Energy Efficient Design

Advances in Manufactured Home Energy Efficient Design
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After connecting with sheet metal screws, this take-off collar is then air sealed and further secured using UL 181 fiber-reinforced duct sealant mastic paste.

After connecting with sheet metal screws, this take-off collar is then air sealed and further secured using UL 181 fiber-reinforced duct sealant mastic paste.
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After securing the inner coil, cover the draw band and the seam with a generous amount of mastic

After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
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Air flow is produced when central HVAC fan is energized (set thermostat to “fan”)

Air flow is produced when central HVAC fan is energized (set thermostat to “fan”)
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Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities

Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities
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Air inlet is located in a convenient place for homeowner to clean

Air inlet is located in a convenient place for homeowner to clean
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Air inlet is not convenient for cleaning and located next to exhaust outlets

Air inlet is not convenient for cleaning and located next to exhaust outlets
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Air seal a heat pump or air conditioner air handler cabinet at all seams, holes, and junctions

Air seal a heat pump or air conditioner air handler cabinet at all seams, holes, and junctions
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Air seal all holes and seams in the furnace cabinet with mastic, foil tape, or putty

Air seal all holes and seams in the furnace cabinet with mastic, foil tape, or putty
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Air seal and insulate flex ducts

Air seal and insulate flex ducts
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Air seal around all duct shafts and flues installed through ceilings, walls, or flooring to keep conditioned air from leaking into unconditioned space.

Air seal around all duct shafts and flues installed through ceilings, walls, or flooring to keep conditioned air from leaking into unconditioned space.
CAD File:

Air seal at chase walls - plan

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Air seal at chase walls - plan
CAD File:

Air seal at duct boot

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Air seal at duct boot
CAD File:

Air seal at duct soffit

Preview Image
Air seal at duct soffit
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Air seal duct boot to ceiling by installing fiberglass mesh tape and mastic over seam

Air seal duct boot to ceiling by installing fiberglass mesh tape and mastic over seam
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All dampers should be completely open in a duct system being tested for air leakage; looking at the actuator from outside the duct is not a reliable way to know damper position, so the pressure downstream of the damper should be measured

All dampers should be completely open in a duct system being tested for air leakage; looking at the actuator from outside the duct is not a reliable way to know damper position, so the pressure downstream of the damper should be measured